Drawbar yoke and method of making the same



Dec. 19, 1922. 1,439,659.

' c. E. BAUER. I

DBAWBAR YOKE AND METHOD OF MAKING THE SAME.

* FILED JULY 15. 1921.

Patented Dec. 19, 1922.

1,43%5a rarest QFFIQE.

CARL E. BAUER, OF HAMMOND, INDIANA.

DRAWBAR YOKE AND IKE'IHOID OF MAKING THE SAME.

Application filed Julv 15,

To aZl'whom it may concern: Be it known that I, CARL E. BAUER, a citizenof the United $tates,-and resident of Hammond, in the county of Lake andState of Indiana, have invented certain new and useful Improvements in aDrawbar Yoke and Method of Making the Same, of which the following is aspecification.

My invention relates to draft rigging appliances and particularly to anovel draw bar yoke.

One of the objects of my invention is to provide a draw bar yoke, whichmay be very economically produced and which shall .pos-- sess unusualstrength and rigidity. The structure is adapted for a simple form ofconnection between the head and yoke strap Without the necessity forperforating or riveting the parts.

The desired result is secured by providing a hollow head in the form of.a sleeve adapted to engage the butt of a drawbar by the usual key, ayoke strap in the form of a double loop engaging the head andaccomplishing the usual function of such straps. The strap is verysimply shaped to occupy its final position and a description of themethod and of the finished structure follows.

The invention will be better understood by reference to the accompanyingdrawings, wherein,

Fig. 1 is a View of a yoke constructed in accordance with my invention,the top and bottom members of the head being shown in section;

Fig. 2 is a plan view thereof;

Fig. 3 is a sectional view on the line 3 3 of Fig. 1, and,

Fig. 4 is aview similar to Fig. 1, showing the preliminary stage ofmanufacture of the device.

In the drawings it will be seen that I provide a head having ears 10,slotted'as at 11, the ears being integral with walls 12-, 13. The wallsconstitute a sleeve having a rectangular opening adapted to accommodatea drawbar butt, indicated at 14. The strap consists of a long,relatively thin bar of metal, bent into a U-shaped member 15, the

arms of which. extend. diagonally to the outer extremities of the walls13, thence around the forward edges 16 thereof, thence inwardly forminga second U-shaped member 17. The

free ends 18, 19, of thestrap, as best shown in Fig. 1, are overlappedat the inner rear of the yoke an m y, if desired, be held.

1921. Serial No. 48%,936.

in position by means of rivets 20, although these will, inmany cases, befound to be unnecessary. The metal of the strap, at the bend around-theforward edge of the walls 13, is thickened as at 21, in order to providegreater strength.

In the process of manufacture the yoke strap is first forged to upsetthe portion 21, and then shaped, as shown in Fig. i, with theextremities curled up, as at 22. These curled up ends are thensuccessively bent laterally into the plane of the opening through thehead and then forced inwardly through the opening into their finalposition. One of the straps shown in Fig. 4 is indicated by dotted linesin its final position.

It is obvious that the construction may be modified to a material extentwithout departure from the spirit of my invention. The relation of theinner and outer straps so far as the ends of the device are concernedmay be reversed if desired and other modifications may be made withinthe scope of my claims.

I claim:

which consists in providing a head, then bending a'bar into U-shape androlling up the ends thereof, then associating the bar with the head andsuccessively forcing the rolled up ends through said head and causingthe material of said rolled up ends to conform to the interior of theU-shaped portion of the yoke.

2. The method of uniting a head and yoke strap, which consists inbending the strap into U-shape with the terminal portions rolled up,then forcing said rolled up ends through the head and simultaneouslyunrolling them and causing the material to con form to the generalcontour of the interior of the U-shaped portion. 7

3. The method of uniting a head and yoke strap which consists in bendingthe strap into U-shape with the terminal portions rolled up, thenforcing said rolled up ends through the head and simultaneouslyunrolling them and causing the material to conform to the generalcontour of the interior of the U-shaped portion with the free ends ofthe strap in overlapping relation at the rear end of the yoke.

4. The method of making a yoke having a head and double straps, whichconsists in upsetting and thickening a portion of the s rap at the pointof end around the head,

then doubling the strap upon itself and rolling up the portions which are to constitute the inner portions ot the double stra n thensuccessively "tore-inn said rolled up portions tlni'ough said head atthe same time in'n'olling; the 8211116 and causing the free end. of onestrap to overlie the free end of the other strep at the inner end of theyoke.

5. A yoke comprising in combination a head and a strap, the strap beingin the form of a double loop engaging the head, the free ends of whichstrap overlie each other inside of the yoke at its rear end;

6. A yoke comprising combination a 15 head and a yoke strap, said strapbeing in the form of connected double loops, one loop contained withinthe other, the head being held between the straps at the junction of thetwo loops.

7. A yoke comprising in combination a head and a pair of U-shaped strapsone within the other and formed by bending a strap inwardly around theside portions of the head, the free ends Oil the strap being locatedinside and at the rear or closed end of the U.

Signed at Chicago, 111., this 11th day of Jul 1921.

I CARL E. BAUER.

